Brick



R. F. MARTIN.

BRICK.

APPLICATION FILED 1uLY2,1920. f

Patented Nm. M, 1922.

Patented NeinJ 14, 11922.,

narran' sientas insana Parana 'carica' BRICK.

Application filed. July 2, 1920.

To all w/Lom 'it may concern.' .p

Be it known that I, Ronn'r F. MAnTiN, a citizen of the UnitedStates, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Bricks, of which the following is a specification.

The present invention relates to improvements in bricks, particularly a brick for use in the building of chimneys, kilns, or other circular structures, although it may be here pointed out that the invention will findv application in other types of chimneys or like structures, and I do not propose, therefore, to limit the same to circular structures.

The primary object of the invention is to provide a brick which, when it is built into the chimney or other structure, will provide a wall in which there will be :a circulation of air throughout the height Vof the wall.

A further object is to provide such brick having interlocking means, so that a wall may be produced in which the bricks yforming the same are interlocked relatively to each other, to the end that a more substantial construction is provided, and the placement of the bricks will be facilitated inasmuch as the interlocking means will be adapted to accurate-ly position the bricks relatively to each other to produce a circular or other shaped wall. With a view to producing air circulation vertically of the wall, as'above pointed out, I propose to provide a brick having a plurality of vertically disposed passages therein, so arranged that the bricks of superimposedl courses will have their passages in alignment so that a plurality of unobstructed vertical passages will eX- tend throughout the height of the wall. The advantage of providing a chimney having circulation of air throughout the wall is that the same will become substantially. uniformly heated throughout, due to the initial heating of the wall at the base, andthe rising Warm air throughout the passages, which will cause the upper portion of the chimney to also become heated, thereby insuring proper draught through th'e chimney without necessitating forced draught, which latter condition is undesirable from many standpoints, and particularly consumes con siderable fuel.`

in connection tbwith the' circulation of air Serial No.l 393,743.

through the chimney, the particular structure I propose for interlocking` the bricks will also have the advantage of producing proper draught through the chimney, inasmuch as the joint formed between the bricks will be Such as to prevent the formation of cavities or openings in the mortar joints, due to the heating of the chimney, and through which air enters to the detriment of the proper draught through the chimney.

A further object is to provide a brick capable of efficient production under the present approved methods of manufacture.

With these and other objects in View, an embodiment of my invention is shown in theaccompanying drawings, and this einbodiment will be hereinafter more fully described with reference thereto, and the invention will be fully pointed out in the claims.

In the accompany ing drawings:

Figure 1 is aperspective view of a brick formed according to the present embodiment of my invention.y

Figure 2 is a top plan view of a section of a. chimney wall embodying the bricks.

Figure 3 is a view in elevation of a section of the chimney Wall.

Figure t is a vertical sectional view taken along the line 4`t of Figure 2.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, and more particularly Figure 1, the brick comprises a block 10, of substantially wedge shape, having an inner concave face 11, an outer convex face 12, concentric to the face 11, and having its degree of curvature determined by the diameter of the chimney into which the brick is to be built, and diverging side faces 13 and 14 radial to the center of the chimney. This general shape is common to bricks for forming chimneys, and is usually referred to as a wed e or'radius brick.

A recess 15 exten s inwardly of the face 13, substantially intermediately the ends of the brick, and upon the face 14: there is formed a projection 16, adapted to enter the recess of the adjacent brick when the same are laid up in the wall, and being of such size as to provide suflicient space between its walls and the walls of the recess to form a mortar joint.

Adjacent the inner face 11 of the brick,

there are provided two spaced vertically disposed passages or bores 17 and 18 substantially small in area extending through the brick, and adjacent the face 12 t.here is provided, in substantially radial allgnment with thel passages 17 and 18, similar passages or bores 19 and 20, extending through the brick, and along the central transverse line of the brick there are provided elongated spaced passages 21 and 22, the passage 21 being substantially near the recess 15, while the passage 22 extends through the projecting portion 16. The several passages or bores are so small in area and so spaced relatively to each other and to the sides of the brick that thickened b-urden bearing Walls result and the spacesbetween the passages of one brick will correspond to the space between the adjacent passages of contiguous bricks when the same are laid up in a Wall and a mortar joint spaces the contiguous bricks, so that, as clearly indicated in Figure 2, the passages are equally spaced throughout the wall structure, and, as the brick are built up into superimposed courses, the alternate courses being offset with relation to the other courses, the passages through the superimposed bricks will register, and thus there will be formed throughout the height of the Wall, a plurality of vertically disposed passages or channels, as indicated in Figure 4, through which air may circulate.

It will be understood that the passages may be circular, if desired, or of any other suitable configuration, but it has been found in practice that the rectangular shape of opening provides a maximum of air circulation, and a saving of material, and at the same time a high degree of strength in the brick. The top of the chimney or other structure may be finished off by means of a coping, which will be preferably of such form as to allow air to enter beneath the same, and into the air circulation passages of the wall. In Figure 4 I have indicated in dotted lilies at 23the shape and positioning of such a coping.

I have illustrated and described a preferred and satisfactory embodiment of my invention, but it is obvious that changes may be made therein Within the spirit and scope Y thereof, as defined in the appended claims.

I claim:

l. In ,circular chimney stack construction, a substantially Wedge-shape block Whose inner andv outer faces are arcuate and Whose radial faces are provided with centrally and circumferentially arranged interfitting tongues and grooves,'the blockl being further provided with vertical sets of bores circumferentially and radially arranged, the inner and outer sets of bores being substantially small in area, resulting in thickened burden bearing walls, the middle set'being arranged in the tongue and the radial portions of the block and between the inner and outer bores.

2. A substantially Wedge shaped interlocking block for chimney construction, said block having inner and outer arcuate side surfaces and substantially radial end surfaces defining the body thereof, said body consisting of an inner and an outer Wall forming portion each being relatively thick and having relatively small openings extending vertically therethrough and a central offset portion presenting on one radial end a projection and on the opposite radial end a recess, said offset portion having relatively long vertical openings therethrough; said recess being of a depth sufficient to receive the tongue of an adjacent block when said blocks are laid in a chimney Wall and allow the vertical opening in said projection to be in substantial radial alignment with the vertical openings of the Wall forming portions.

In testimony that I claim the foregoing as my invention, I have signed my name.

ROBERT F. MARTIN` 

